fix: remove unused `requests` dependency from simple-chatbot example … #5

Job	Run time
checks / pre-commit	38s
checks / readme-snippets	13s
checks / test (3.10, locked, windows-latest)	2m 36s
checks / test (3.10, lowest-direct, ubuntu-latest)	54s
checks / test (3.11, lowest-direct, ubuntu-latest)	55s
checks / test (3.10, lowest-direct, windows-latest)	2m 29s
checks / test (3.11, lowest-direct, windows-latest)	2m 40s
checks / test (3.11, locked, ubuntu-latest)	46s
checks / test (3.10, locked, ubuntu-latest)	53s
checks / test (3.11, locked, windows-latest)	2m 36s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 19s
checks / test (3.12, locked, ubuntu-latest)	53s
checks / test (3.13, locked, windows-latest)	2m 12s
checks / test (3.12, locked, windows-latest)	3m 25s
checks / test (3.12, lowest-direct, ubuntu-latest)	53s
checks / test (3.13, lowest-direct, ubuntu-latest)	50s
checks / test (3.14, locked, windows-latest)	3m 5s
checks / test (3.13, locked, ubuntu-latest)	47s
checks / test (3.12, lowest-direct, windows-latest)	4m 11s
checks / test (3.13, lowest-direct, windows-latest)	2m 36s
checks / test (3.14, locked, ubuntu-latest)	2m 15s
checks / test (3.14, lowest-direct, windows-latest)	3m 2s
all-green	2s
	40m 10s

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